/*********************
 * P25 摩斯电码
 */
const int LED = 13;
int t = 150;
void setup() {
    pinMode(LED, OUTPUT); //板载13号灯设置为输出
}

void loop() {
    // code here
    digitalWrite(LED, HIGH);
    delay(t);
    digitalWrite(LED, LOW);
    delay(t);
}
